Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".
Table of n, a(n) for n=1..57.
Sequence in context: A102758 A176815 A220571 * A080752 A262159 A020744
Adjacent sequences: A033869 A033870 A033871 * A033873 A033874 A033875